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Old 04-26-2018, 01:44 PM   #8
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Join Date: Feb 2010
City & State: S.F. Bay area
My Country: USA
Line Voltage: 120V 60Hz
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Posts: 38,931
Default Re: Dell U2413 turning off

Check the Voltages when missing and when it does not work, see marked pictures.
The DC Voltage measured between the two legs of the main filter cap in the host side should be around 380 ~ 400VDC when monitor is turned on.
Attached Images
File Type: jpg Power supply function block.jpg (2.56 MB, 169 views)
File Type: jpg Power supply outputs.jpg (1.82 MB, 92 views)
Never stop learning
Basic LCD TV and Monitor troubleshooting guides.

Voltage Regulator (LDO) testing:

Inverter testing using old CFL:

Tear down pictures : Hit the ">" Show Albums and stories" on the left side

TV Factory reset codes listing:
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